US5002092A - Inline venturi for pneumatic conveying systems - Google Patents

Inline venturi for pneumatic conveying systems Download PDF

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Publication number
US5002092A
US5002092A US07/418,628 US41862889A US5002092A US 5002092 A US5002092 A US 5002092A US 41862889 A US41862889 A US 41862889A US 5002092 A US5002092 A US 5002092A
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United States
Prior art keywords
air
pipe
venturi device
chamber
blower
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Expired - Lifetime
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US07/418,628
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English (en)
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Frank V. Oirschot
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/40—Feeding or discharging devices
    • B65G53/50—Pneumatic devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/58—Devices for accelerating or decelerating flow of the materials; Use of pressure generators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87571—Multiple inlet with single outlet
    • Y10T137/87587—Combining by aspiration
    • Y10T137/87611—Flow control by varying position of a fluid inlet relative to entrainment chamber

Definitions

  • the present invention relates to an inline adjustable venturi device providing an air draw in a pneumatic system and also usable as an inline air boost in that pneumatic system.
  • the novel aspect of the venturi device of the present invention resides in its ability to adjust for maximum efficiency according to the blower capacity used in the pneumatic system.
  • venturi devices There are many different types of systems which use venturi devices.
  • the purpose of the venturi device is to provide an air draw or suction to draw in different types of products passed through a pneumatic feed system.
  • a venturi device has a fixed configuration and therefore is not adjustable according to the capacity of the particular blower used in the pneumatic feed system.
  • the conventional venturi is not designed for adjustment for variable air draws which may be selected according to the product drawn into the pneumatic feed system.
  • the present invention provides an inline adjustable venturi device for use in a blower operated pneumatic system and designed for efficient use with blowers of different capacities.
  • the venturi device of the present invention includes a blower feedable positive air passage, a negative pressure air inlet exposed to and operated by air draw from the positive air passage and means for varying exposure of the air inlet to the positive air passage with a resultant varying of the air draw according to capacity of the particular blower used with the venturi device.
  • the venturi device of the present invention is therefore adjustable to accommodate not only different blower capacities but additionally to accommodate the air draw of different types of products into without having to change the venturi device.
  • FIG. 1 is a side view of a venturi device according to a preferred embodiment of the present invention and for use in a blower operated pneumatic feed system;
  • FIG. 2 is a side view of an air drawn enhancing pipe section useable with the venturi device of FIG. 1;
  • FIG. 3 is a front view looking into the venturi device of FIG. 1;
  • FIG. 4 is a side view of the venturi device of FIG. 1 with a mechanical arrangement for moving the telescopic section according to a further preferred embodiment of the present invention
  • FIG. 5 is an end view showing the connection of the mechanical arrangement to the pipe section of FIG. 4.
  • FIG. 1 shows a venturi device generally indicated at 1.
  • This venturi device fits directly into a pneumatic system such as a pneumatic feed system for different types of products. These products can range from solid to gaseous and even liquid products.
  • Venturi device 1 has a positive high pressure air feed generally indicated at 3 and to be coupled with a blower for the pneumatic feed system. Extending at generally right angles to the air feed 3 is a negative pressure air inlet generally indicated at 5. The amount of air draw at air inlet 5 is determined by its exposure relative to the high pressure air passage fed by the blower and described below in detail.
  • the overall venturi device comprises a main body portion 7 with an air flow region which includes a tapered and in particular a conical portion 9.
  • Conical portion 9 preferably has a forward inward taper of about 20°. As will be immediately apparent from the drawings, this conical portion varies in its diameter and in particular, decreases in diameter towards its more tapered forward end.
  • the air inlet passage comprises an elongated pipe 15 which extends through body portion 7 and towards the conical portion 9.
  • Pipe 15 is telescopic within body portion 7 and relative to conical portion 9.
  • FIG. 1 shows the pipe 15 in two different positions. In one of these positions, the outer end of pipe 15 appearing to the left hand side of the Figure is moved farther outwardly away from body portion 7. This obviously affects the location of the inner end of the pipe which in this retracted setting is moved to position B relative to conical portion 9.
  • the venturi device is provided with internal baffles 17 which guide the fitting of pipe 15 internally of the venturi device.
  • Pipe 15 has a solid construction.
  • the pipe can be moved either mechanically or manually. It may be moved to the left in FIG. 1 to a position such as position A where it is very close to the smaller diameter region of cone portion 9 and in fact can be pushed into abutment with the conical portion to cut off all exposure of the air inlet relative to the positive air feed through the venturi device.
  • pipe 15 can also be retracted such that its inner end moves away from the smaller diameter region to a larger diameter region in the conical portion 9. This is shown by position B where there is a substantial exposure completely around the pipe as indicated at C of the air inlet 5 to the high pressure air fed through the conical portion 9.
  • the venturi device is used with a higher capacity blower, the pipe 15 is retracted farther to the left leaving a greater opening between its inner end and conical portion 9. If it is used with a lower capacity blower then the pipe is moved farther to the right closing the gap between its inner end and a smaller diameter region on the conical portion. Furthermore, as noted above, pipe 15 can be moved to the right to the point where its inner end actually contacts the inner surface of the conical portion to completely shut off the air draw through the pipe.
  • a blower is connected to the high pressure inlet 3 of the venturi device.
  • pipe 15 When pipe 15 is in a retracted position, i.e. the inner end of the pipe pulled away from conical portion 9, the high pressure air from the blower blows up and around pipe 15 forwardly past the inner end of the pipe and through conical portion 9 into a further pipe section 17 to be described later in detail.
  • This creates a cone or funnel shaped air flow surrounding the inner end of pipe 15 and blowing forwardly out of cone shape portion 9.
  • the actual shape of the cone of air varies according to the degree to which pipe 15 is retracted.
  • FIG. 1 shows a further pipe section 17 connected at its inner end 19 to the venturi device downstream of conical portion 9. This pipe section is used to straighten the air flow which, as noted above, emerges from the conical portion as a cone or funnel of air. In order to have the desired straightening effect on the air flow, i.e.
  • pipe section 17 has a length L, i.e. the distance between the inner end 19 and the outer end 21 of pipe section 17 which is 31/2 to 4 times the diameter D of pipe section 17. These proportions are particularly effective in straightening and reducing turbulence of the air flow eminating from pipe section 17.
  • FIG. 2 shows a further pipe section 23 which connects to the outer end 21 of pipe section 17.
  • pipe section 23 is outwardly flared, preferably at an angle of about 4 degrees from horizontal and produces a static pressure regain which enhances the venturi effect at venturi device 1.
  • venturi device 1 can be used with various different types of pneumatic feed system.
  • one particularly useful system is in the handling of expanded polystyrene which is packed in small particle sizes and used for furniture and the like and in the manufacture of STYROFOAM sheets as the STYROFOAM sheets are made of small balls of expanded polystyrene.
  • the packing of the expanded polystyrene unfortunately results in the impacting of the product along the packing route, thereby increasing its density and substantially decreasing its volumn.
  • the venturi device can be set up with a very specific draw at a level and in a generally straight path for a much more gentle handling of the expanded polystyrene which maintains its low density and high volume characteristics desirable from both a manufacturing and a cost saving standpoint.
  • the venturi device of the present invention is also particularly suitable for the handling of long stringy type material as well as large components such as plastic bottles and foam strips which generally cannot be handled by an air lock system since these materials have a tendancy to wrap around the air lock paddles thereby causing them to become plugged.
  • the venturi device of the present invention therefore makes it possible to handle many materials which are not presently suited to be handled by conventional air pick up systems.
  • venturi i.e. the negative draw passage through pipe 15 is not restricted to material flow as the draw passage is of consistent diameter from the outer end of pipe section 15 to the end 21 of pipe section 17. From here the pipe section 23 actually diverges outwardly to eliminate any restrictions along the draw passage even in view of the use of cone section 9 for creating the venturi effect.
  • the venturi device is useable for the handling of chemicals and in particular caustic gases and the like.
  • the venturi device is made from a corrosion resistant material such as stainless steel.
  • adjustment both inwardly and outwardly of the telescopic pipe, can be done either manually or mechanically. It can also be done pneumatically.
  • One particularly good adjustment device is in the form of a lever operated on the pipe.
  • Another adjustment method uses a threaded connection of the pipe in the device which provides very accurate positioning of the pipe. It also ensures a very positive seal or interlock between the pipe and the main body of the venturi device. To enhance sealing properties O-ring seals etc., may be provided around the pipe internally of the device.
  • FIGS. 4 and 5 show a preferred embodiment mechanical arrangement generally indicated at 25 for adjusting the position of pipe 15.
  • This arrangement comprises a yoke-like fitting 27 having a pair of downwardly extending arm sections 28 mounted by means of standoff mounts 30 to pipe section 15.
  • the standoff mounts allow a swinging action of yoke 27 relative to pipe 15 to be described later in detail.
  • yoke 27 Extending upwardly from yoke 27 is a rod 31 pivotally secured at 33 to a support 39 for the mechanical adjuster.
  • the pivotal mount 33 can be made, for example by means of a pin and cotter key assembly.
  • a control piston 35 is pivotally secured at one end 38 to rod 31 and at its other end 37 to support 39.
  • This cylinder can either be expanded or contracted which results in either inward or outward movement respectively of pipe 15 as described immediately below.
  • piston 35 When it is desired to move pipe 15 to a more retracted position outwardly of the venturi device, piston 35 is contracted, i.e. shortened, pulling the end of rod 31 to the right in FIG. 4 and causing its lower end to pivot outwardly away from the venturi device while pulling the pipe 15 outwardly with it in the same manner as described above but in the opposite direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Nozzles (AREA)
  • Spray Control Apparatus (AREA)
  • Feeding And Watering For Cattle Raising And Animal Husbandry (AREA)
US07/418,628 1989-07-24 1989-10-10 Inline venturi for pneumatic conveying systems Expired - Lifetime US5002092A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000606508A CA1273380A (fr) 1989-07-24 1989-07-24 Venturi pour systeme de transporteurs pneumatiques
CA606508 1989-07-24

Publications (1)

Publication Number Publication Date
US5002092A true US5002092A (en) 1991-03-26

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ID=4140384

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/418,628 Expired - Lifetime US5002092A (en) 1989-07-24 1989-10-10 Inline venturi for pneumatic conveying systems

Country Status (7)

Country Link
US (1) US5002092A (fr)
EP (1) EP0466699B1 (fr)
AT (1) ATE103568T1 (fr)
CA (1) CA1273380A (fr)
DE (1) DE69007787T2 (fr)
DK (1) DK0466699T3 (fr)
WO (1) WO1991011379A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5931664A (en) * 1997-04-21 1999-08-03 General Kinematics Corporation Non-mechanical leak-proof coupling
US20100080683A1 (en) * 2008-09-08 2010-04-01 Flodesign Wind Turbine Corporation Systems and methods for protecting a wind turbine in high wind conditions
US9266688B2 (en) 2010-09-30 2016-02-23 General Electric Company Feed vessels and systems for pneumatically conveying solid particles
US20160101376A1 (en) * 2013-05-06 2016-04-14 Fmc Separation Systems, Bv Fluidizing unit and discharging system
CN109720533A (zh) * 2018-12-21 2019-05-07 中国海洋石油集团有限公司 用于fpso的空气置换装置及其使用方法
US11952224B2 (en) * 2021-10-03 2024-04-09 Louis Handfield Pneumatic conveying venturi for flake ice

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100342275B1 (ko) * 1993-10-21 2002-12-05 지.디. 썰 엘엘씨 산화질소신타제저해제로서유용한아미디노유도체
CN1420769A (zh) 1998-09-08 2003-05-28 孟山都公司 用可诱导的氧化氮合成酶的抑制剂治疗骨关节炎的方法
EP3455566B1 (fr) * 2016-03-07 2021-08-18 Industries SnöFlake Inc. Ensemble de transport pour appareil de fabrication de neige

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233991A (en) * 1916-08-24 1917-07-17 Philippe L Des Jardins Suction-creating apparatus.
US1806287A (en) * 1929-03-13 1931-05-19 Universal Lifting Appliance Co Ejector
US1854098A (en) * 1929-06-14 1932-04-12 Commercial Patents Dev Company Ejector
US2794447A (en) * 1954-05-14 1957-06-04 Deruss Machine Products Co Inc Mixing valve
CH515188A (de) * 1971-02-26 1971-11-15 Mueller Ag Klingnau E Heizeinrichtung zum Erwärmen von Schlamm, insbesondere Abwasserschlamm
US3960175A (en) * 1974-08-16 1976-06-01 Veb Chemieanlagenbau Und Montagekombinat Leipzig Installation for charging liquids, particularly fermentation liquids, with gas
US4186772A (en) * 1977-05-31 1980-02-05 Handleman Avrom Ringle Eductor-mixer system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2216267A1 (de) * 1972-04-05 1973-11-29 Kuepper Gerd Strahlduese zum foerdern von schuettgut mittels unter druck stehender medien
GB1576821A (en) * 1977-04-22 1980-10-15 Bower Eng Ltd Transporting pulverulent material
FR2416857A2 (fr) * 1978-02-09 1979-09-07 Gogneau Achille Accelerateur de fluides et materiaux

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233991A (en) * 1916-08-24 1917-07-17 Philippe L Des Jardins Suction-creating apparatus.
US1806287A (en) * 1929-03-13 1931-05-19 Universal Lifting Appliance Co Ejector
US1854098A (en) * 1929-06-14 1932-04-12 Commercial Patents Dev Company Ejector
US2794447A (en) * 1954-05-14 1957-06-04 Deruss Machine Products Co Inc Mixing valve
CH515188A (de) * 1971-02-26 1971-11-15 Mueller Ag Klingnau E Heizeinrichtung zum Erwärmen von Schlamm, insbesondere Abwasserschlamm
US3960175A (en) * 1974-08-16 1976-06-01 Veb Chemieanlagenbau Und Montagekombinat Leipzig Installation for charging liquids, particularly fermentation liquids, with gas
US4186772A (en) * 1977-05-31 1980-02-05 Handleman Avrom Ringle Eductor-mixer system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5931664A (en) * 1997-04-21 1999-08-03 General Kinematics Corporation Non-mechanical leak-proof coupling
US20100080683A1 (en) * 2008-09-08 2010-04-01 Flodesign Wind Turbine Corporation Systems and methods for protecting a wind turbine in high wind conditions
US8545187B2 (en) * 2008-09-08 2013-10-01 Flodesign Wind Turbine Corp. Systems and methods for protecting a wind turbine in high wind conditions
US9266688B2 (en) 2010-09-30 2016-02-23 General Electric Company Feed vessels and systems for pneumatically conveying solid particles
US20160101376A1 (en) * 2013-05-06 2016-04-14 Fmc Separation Systems, Bv Fluidizing unit and discharging system
US9527013B2 (en) * 2013-05-06 2016-12-27 Fmc Separation Systems Bv Fluidizing unit and discharging system
CN109720533A (zh) * 2018-12-21 2019-05-07 中国海洋石油集团有限公司 用于fpso的空气置换装置及其使用方法
US11952224B2 (en) * 2021-10-03 2024-04-09 Louis Handfield Pneumatic conveying venturi for flake ice

Also Published As

Publication number Publication date
DE69007787T2 (de) 1994-08-25
EP0466699A1 (fr) 1992-01-22
CA1273380A (fr) 1990-08-28
WO1991011379A1 (fr) 1991-08-08
EP0466699B1 (fr) 1994-03-30
DK0466699T3 (da) 1994-05-02
ATE103568T1 (de) 1994-04-15
DE69007787D1 (de) 1994-05-05

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